add modal token handling

app.py

@@ -1,10 +1,21 @@
 import streamlit as st
 import pandas as pd
 from modal import Function
+import os
+import modal
+
+# Initialize Modal with token
+if 'MODAL_TOKEN' in os.environ:
+    modal.config.auth.token = os.environ['MODAL_TOKEN']
 
 def main():
     st.title("Financial Statement Analyzer")
     
+    # Check Modal token
+    if 'MODAL_TOKEN' not in os.environ:
+        st.error("Modal token not found. Please add MODAL_TOKEN to Space secrets.")
+        return
+    
     uploaded_files = st.file_uploader(
         "Choose PDF files", 
         type="pdf", 

requirements.txt

@@ -1,3 +1,5 @@
 modal>=0.56.4
+modal-client>=0.56.4
 streamlit>=1.32.0
-pandas>=2.2.0
+pandas>=2.2.0
+python-dotenv>=1.0.0